What’s the difference between vegan and vegetarian?
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What’s the difference? is a new editorial product that explains the similarities and differences between commonly confused health and medical terms, and why they matter.
Vegan and vegetarian diets are plant-based diets. Both include plant foods, such as fruits, vegetables, legumes and whole grains.
But there are important differences, and knowing what you can and can’t eat when it comes to a vegan and vegetarian diet can be confusing.
So, what’s the main difference?
What’s a vegan diet?
A vegan diet is an entirely plant-based diet. It doesn’t include any meat and animal products. So, no meat, poultry, fish, seafood, eggs, dairy or honey.
What’s a vegetarian diet?
A vegetarian diet is a plant-based diet that generally excludes meat, poultry, fish and seafood, but can include animal products. So, unlike a vegan diet, a vegetarian diet can include eggs, dairy and honey.
But you may be wondering why you’ve heard of vegetarians who eat fish, vegetarians who don’t eat eggs, vegetarians who don’t eat dairy, and even vegetarians who eat some meat. Well, it’s because there are variations on a vegetarian diet:
- a lacto-ovo vegetarian diet excludes meat, poultry, fish and seafood, but includes eggs, dairy and honey
- an ovo-vegetarian diet excludes meat, poultry, fish, seafood and dairy, but includes eggs and honey
- a lacto-vegetarian diet excludes meat, poultry, fish, seafood and eggs, but includes dairy and honey
- a pescatarian diet excludes meat and poultry, but includes eggs, dairy, honey, fish and seafood
- a flexitarian, or semi-vegetarian diet, includes eggs, dairy and honey and may include small amounts of meat, poultry, fish and seafood.
Are these diets healthy?
A 2023 review looked at the health effects of vegetarian and vegan diets from two types of study.
Observational studies followed people over the years to see how their diets were linked to their health. In these studies, eating a vegetarian diet was associated with a lower risk of developing cardiovascular disease (such as heart disease or a stroke), diabetes, hypertension (high blood pressure), dementia and cancer.
For example, in a study of 44,561 participants, the risk of heart disease was 32% lower in vegetarians than non-vegetarians after an average follow-up of nearly 12 years.
Further evidence came from randomised controlled trials. These instruct study participants to eat a specific diet for a specific period of time and monitor their health throughout. These studies showed eating a vegetarian or vegan diet led to reductions in weight, blood pressure, and levels of unhealthy cholesterol.
For example, one analysis combined data from seven randomised controlled trials. This so-called meta-analysis included data from 311 participants. It showed eating a vegetarian diet was associated with a systolic blood pressure (the first number in your blood pressure reading) an average 5 mmHg lower compared with non-vegetarian diets.
It seems vegetarian diets are more likely to be healthier, across a number of measures.
For example, a 2022 meta-analysis combined the results of several observational studies. It concluded a vegetarian diet, rather than vegan diet, was recommended to prevent heart disease.
There is also evidence vegans are more likely to have bone fractures than vegetarians. This could be partly due to a lower body-mass index and a lower intake of nutrients such as calcium, vitamin D and protein.
But it can be about more than just food
Many vegans, where possible, do not use products that directly or indirectly involve using animals.
So vegans would not wear leather, wool or silk clothing, for example. And they would not use soaps or candles made from beeswax, or use products tested on animals.
The motivation for following a vegan or vegetarian diet can vary from person to person. Common motivations include health, environmental, ethical, religious or economic reasons.
And for many people who follow a vegan or vegetarian diet, this forms a central part of their identity.
So, should I adopt a vegan or vegetarian diet?
If you are thinking about a vegan or vegetarian diet, here are some things to consider:
- eating more plant foods does not automatically mean you are eating a healthier diet. Hot chips, biscuits and soft drinks can all be vegan or vegetarian foods. And many plant-based alternatives, such as plant-based sausages, can be high in added salt
- meeting the nutrient intake targets for vitamin B12, iron, calcium, and iodine requires more careful planning while on a vegan or vegetarian diet. This is because meat, seafood and animal products are good sources of these vitamins and minerals
- eating a plant-based diet doesn’t necessarily mean excluding all meat and animal products. A healthy flexitarian diet prioritises eating more whole plant-foods, such as vegetables and beans, and less processed meat, such as bacon and sausages
- the Australian Dietary Guidelines recommend eating a wide variety of foods from the five food groups (fruit, vegetables, cereals, lean meat and/or their alternatives and reduced-fat dairy products and/or their alternatives). So if you are eating animal products, choose lean, reduced-fat meats and dairy products and limit processed meats.
Katherine Livingstone, NHMRC Emerging Leadership Fellow and Senior Research Fellow at the Institute for Physical Activity and Nutrition, Deakin University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Could my glasses be making my eyesight worse?
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So, you got your eyesight tested and found out you need your first pair of glasses. Or you found out you need a stronger pair than the ones you have. You put them on and everything looks crystal clear. But after a few weeks things look blurrier without them than they did before your eye test. What’s going on?
Some people start to wear spectacles for the first time and perceive their vision is “bad” when they take their glasses off. They incorrectly interpret this as the glasses making their vision worse. Fear of this might make them less likely to wear their glasses.
But what they are noticing is how much better the world appears through the glasses. They become less tolerant of a blurry world when they remove them.
Here are some other things you might notice about eyesight and wearing glasses.
Lazy eyes?
Some people sense an increasing reliance on glasses and wonder if their eyes have become “lazy”.
Our eyes work in much the same way as an auto-focus camera. A flexible lens inside each eye is controlled by muscles that let us focus on objects in the distance (such as a footy scoreboard) by relaxing the muscle to flatten the lens. When the muscle contracts it makes the lens steeper and more powerful to see things that are much closer to us (such as a text message).
From the age of about 40, the lens in our eye progressively hardens and loses its ability to change shape. Gradually, we lose our capacity to focus on near objects. This is called “presbyopia” and at the moment there are no treatments for this lens hardening.
Optometrists correct this with prescription glasses that take the load of your natural lens. The lenses allow you to see those up-close images clearly by providing extra refractive power.
Once we are used to seeing clearly, our tolerance for blurry vision will be lower and we will reach for the glasses to see well again.
The wrong glasses?
Wearing old glasses, the wrong prescription (or even someone else’s glasses) won’t allow you to see as well as possible for day-to-day tasks. It could also cause eyestrain and headaches.
Incorrectly prescribed or dispensed prescription glasses can lead to vision impairment in children as their visual system is still in development.
But it is more common for kids to develop long-term vision problems as a result of not wearing glasses when they need them.
By the time children are about 10–12 years of age, wearing incorrect spectacles is less likely to cause their eyes to become lazy or damage vision in the long term, but it is likely to result in blurry or uncomfortable vision during daily wear.
Registered optometrists in Australia are trained to assess refractive error (whether the eye focuses light into the retina) as well as the different aspects of ocular function (including how the eyes work together, change focus, move around to see objects). All of these help us see clearly and comfortably.
Younger children with progressive vision impairments may need more frequent eye tests. Shutterstock What about dirty glasses?
Dirty or scratched glasses can give you the impression your vision is worse than it actually is. Just like a window, the dirtier your glasses are, the more difficult it is to see clearly through them. Cleaning glasses regularly with a microfibre lens cloth will help.
While dirty glasses are not commonly associated with eye infections, some research suggests dirty glasses can harbour bacteria with the remote but theoretical potential to cause eye infection.
To ensure best possible vision, people who wear prescription glasses every day should clean their lenses at least every morning and twice a day where required. Cleaning frames with alcohol wipes can reduce bacterial contamination by 96% – but care should be taken as alcohol can damage some frames, depending on what they are made of.
When should I get my eyes checked?
Regular eye exams, starting just before school age, are important for ocular health. Most prescriptions for corrective glasses expire within two years and contact lens prescriptions often expire after a year. So you’ll need an eye check for a new pair every year or so.
Kids with ocular conditions such as progressive myopia (short-sightedness), strabismus (poor eye alignment), or amblyopia (reduced vision in one eye) will need checks at least every year, but likely more often. Likewise, people over 65 or who have known eye conditions, such as glaucoma, will be recommended more frequent checks.
Eye checks can detect broader health issues. Shutterstock An online prescription estimator is no substitute for a full eye examination. If you have a valid prescription then you can order glasses online, but you miss out on the ability to check the fit of the frame or to have them adjusted properly. This is particularly important for multifocal lenses where even a millimetre or two of misalignment can cause uncomfortable or blurry vision.
Conditions such as diabetes or high blood pressure, can affect the eyes so regular eye checks can also help flag broader health issues. The vast majority of eye conditions can be treated if caught early, highlighting the importance of regular preventative care.
James Andrew Armitage, Professor of Optometry and Course Director, Deakin University and Nick Hockley, Lecturer in Optometric Clinical Skills, Director Deakin Collaborative Eye Care Clinic, Deakin University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Capsaicin For Weight Loss And Against Inflammation
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Capsaicin’s Hot Benefits
Capsaicin, the compound in hot peppers that makes them spicy, is a chemical irritant and a neurotoxin. However, humans being humans, we decided to eat them for fun.
In contrast to many other ways in which humans recreationally enjoy things that are objectively poisonous, consuming capsaicin (in moderation) is considered to have health benefits, such as aiding weight loss (by boosting metabolism) and reducing inflammation.
Let’s see what the science says…
First: is it safe?
Capsaicin is classified as “Generally Recognized As Safe”. That said, the same mechanism that causes them to boost metabolism, does increase blood pressure:
Mechanisms underlying the hypertensive response induced by capsaicin
If you are in good cardiovascular health, this increase should be slight and not pose any threat, unless for example you enter a chili-eating contest when not acclimated to such:
Capsaicin and arterial hypertensive crisis
As ever, if unsure, do check with your doctor first, especially if you are taking any blood pressure medications, or otherwise have known blood pressure issues.
Does it really boost metabolism?
It certainly does; it works by increasing oxygen consumption and raising body temperature, both of which mean more calories will be burned for the same amount of work:
Dietary capsaicin and its anti-obesity potency: from mechanism to clinical implications
This means, of course, that chili peppers enjoy the status of being functionally a “negative calorie” food, and a top-tier one at that:
Chili pepper as a body weight-loss food
Here’s a good quality study that showed a statistically significant* fat loss improvement over placebo:
*To put it in numbers, the benefit was:
- 5.91 percentage points lower body fat percentage than placebo
- 6.68 percentage points greater change in body fat mass than placebo
See also: Difference between percentages and percentage points
For those who prefer big reviews than single studies, we’ve got you covered:
Does it really reduce inflammation?
Counterintuitive as it may seem, yes. By means of reducing oxidative stress. Given that things that reduce oxidative stress tend to reduce inflammation, and in turn tend to reduce assorted disease risks (from diabetes to cancer to Alzheimer’s), this probably has more knock-on benefits too, but we don’t have room to explore all of those today.
Fresh peppers are best for this, but dried peppers (such as when purchased as a ground spice in the supermarket, or when purchased as a capsule-based supplement) still have a very respectable anti-inflammatory effect:
- Capsaicinoids, Polyphenols and Antioxidant Activities of Capsicum annuum: Comparative Study of the Effect of Ripening Stage and Cooking Methods
- A Review on the Effect of Drying on Antioxidant Potential of Fruits and Vegetables
How much should we take?
It’s recommended to start at a low dose and gradually increase it, but 2–6mg of capsaicin per day is the standard range used in studies.
If you’re getting this from peppers, then for example cayenne pepper (a good source of capsaicin) contains around 2.5mg of capsaicin per 1 gram of cayenne.
In the case of capsules, if for example you don’t like eating hot pepper, this will usually mean taking 2–6 capsules per day, depending on dosage.
Make sure to take it with plenty of water!
Where can we get it?
Fresh peppers or ground spice from your local grocery store is fine. Your local health food store probably sells the supplements, too.
If you’d like to buy it online, here is an example product on Amazon.
Note: options on Amazon were more limited than usual, so this product is not vegan, and probably not halal or kosher, as the capsule contains an unspecified gelatin.
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Healing Arthritis – by Dr. Susan Blum
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We previously reviewed another book by this author, her Immune System Recovery Plan, and today it’s more specific: healing arthritis
Of course, not all arthritis is rooted in immune dysfunction, but a) all of it is made worse by immune dysfunction and b) rheumatoid arthritis, which is an autoimmune disease, affects 1% of the population.
This book tackles all kinds of arthritis, by focusing on addressing the underlying causes and treating those, and (whether it was the cause or not) reducing inflammation without medication, because that will always help.
The “3 steps” mentioned in the subtitle are three stages of a plan to improve the gut microbiome in such a way that it not only stops worsening your arthritis, but starts making it better.
The style here is on the hard end of pop-science, so if you want something more conversational/personable, then this won’t be so much for you, but if you just want the information and explanation, then this does it just fine, and it has frequent references to the science to back it up, with a reassuringly extensive bibliography.
Bottom line: if you have arthritis and want a book that will help you to get either symptom-free or as close to that as is possible from your current condition (bearing in mind that arthritis is generally degenerative), then this is a great book for that.
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Caffeine: Cognitive Enhancer Or Brain-Wrecker?
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The Two Sides Of Caffeine
We asked you for your health-related opinions on caffeine itself, not necessarily the coffee, tea, energy drinks, etc that might contain it.
We have, by the way previously written about the health effects of coffee and tea specifically:
As for our question about caffeine itself, though, we got the above-depicted, below-described, set of results:
- About 59% said “caffeine is a safe stimulant and cognitive enhancer”
- About 31% said “caffeine is a moderately safe recreational drug”
- About 8% said “caffeine’s addictive properties make it de facto bad”
- One (1) person said “caffeine will leave you a trembling exhausted wreck”
But what does the science say?
Caffeine is addictive: True or False?
True, though one will find occasional academics quibbling the definition. Most of the studies into the mechanisms of caffeine addiction have been conducted on rats, but human studies exist too and caffeine is generally considered addictive for humans, for example:
See also:
Notwithstanding its addictive status, caffeine is otherwise safe: True or False?
True-ish, for most people. Some people with heart conditions or a hypersensitivity to caffeine may find it is not safe for them at all, and for the rest of us, the dose makes the poison. For example:
❝Can too much caffeine kill you? Although quite rare, caffeine can be fatal in cases of overdose; such circumstances are generally not applicable to healthy individuals who typically consume caffeine via beverages such as tea or coffee.❞
this paper, by the way, also includes a good example of academics quibbling the definition of addiction!
Caffeine is a cognitive enhancer: True or False?
True, but only in the case of occasional use. If you are using it all the time, your physiology will normalize it and you will require caffeine in order to function at your normal level. To attain higher than that, once addicted to caffeine, would now require something else.
Read more: Caffeine: benefits and drawbacks for technical performance
Caffeine will leave you a trembling exhausted wreck: True or False?
True or False depending on usage:
- The famously moderate 3–5 cups per day will not, for most people, cause any such problems.
- Using/abusing it to make up for lost sleep (or some other source of fatigue, such as physical exhaustion from exertion), however, is much more likely to run into problems.
In the latter case, caffeine really is the “payday loan” of energy! It’ll give you an adrenal boost now (in return, you must suffer the adrenal dumping later, along with lost energy expended in the adrenaline surge), and also, the tiredness that you thought was gone, was just caffeine’s adenosine-blocking activities temporarily preventing you from being able to perceive the tiredness. So you’ll have to pay that back later, with interest, because of the extra time/exertion too.
Want to make caffeine a little more gentle on your system?
Taking l-theanine alongside caffeine can ameliorate some of caffeine’s less wonderful effects—and as a bonus, l-theanine has some nifty benefits of its own, too:
Enjoy!
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Cure – by Dr. Jo Marchant
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The subtitle here, “a journey into the science of mind over body”, prompts an immediate question: is this book actually about science?
And yes, yes it is. It’s not about “positive energy” or “tapping into your divine essence” or anysuch. It’s about science, and scientific studies.
The author’s PhD is in genetics and medical microbiology, not metaphysics or something.
For those of us who read a lot of clinical studies about a lot of things (hi, regular researcher/writer here), we’re very used to placebo being used as a control in medical science.
“This drug performed no better than placebo” is generally considered a disappointing statement… But what if the placebo was already having a profound effect? Shouldn’t that be worthy of note too?
Dr. Marchant looks at more than just drugs, though, and also looks into the science (complete with EEGs and such) of hypnosis and virtual reality.
The writing style here is very accessible without skimping on science. This is to be expected; Dr. Marchant also has an MSc in science communication, and spent a time as senior editor of New Scientist magazine.
This isn’t a how-to book, but there are some practical takeaways too, specific things we can do to augment (or avoid sabotaging) any medications we take, for example.
Bottom line: placebo effect (and its evil twin, the nocebo effect) has a profound impact on all of us whether we want it or not, so we might as well learn about how it works and how to leverage it. This book gives a very good, hard science grounding.
Click here to check out “Cure” and get the most out of whatever you take (or do) for your health!
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Sometimes, Perfect Isn’t Practical!
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It’s Q&A Day at 10almonds!
Have a question or a request? We love to hear from you!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝10 AM breakfast is not realistic for most. What’s wrong with 8 AM and Evening me at 6. Don’t quite understand the differentiation.❞
(for reference, this is about our “Breakfasting For Health?” main feature)
It’s not terrible to do it the way you suggest It’s just not optimal, either, that’s all!
Breakfasting at 08:00 and then dining at 18:00 is ten hours apart, so no fasting benefits between those. Let’s say you take half an hour to eat dinner, then eat nothing again until breakfast, that’s 18:30 to 08:00, so that’s 13½ hours fasting. You’ll recall that fasting benefits start at 12 hours into the fast, so that means you’d only get 1½ hours of fasting benefits.
As for breakfasting at 08:00 regardless of intermittent fasting considerations, the reason for the conclusion of around 10:00 being optimal, is based on when our body is geared up to eat breakfast and get the most out of that, which the body can’t do immediately upon waking. So if you wake and get sunlight at 08:30, get a little moderate exercise, then by 10:00 your digestive system will be perfectly primed to get the most out of breakfast.
However! This is entirely based on you waking and getting sunlight at 08:30.
So, iff you wake and get sunlight at 06:30, then in that case, breakfasting at 08:00 would give the same benefits as described above. What’s important is the 1½ hour priming-time.
Writer’s note: our hope here is always to be informational, not prescriptive. Take what works for you; ignore what doesn’t fit your lifestyle.
I personally practice intermittent fasting for about 21hrs/day. I breakfast (often on nuts and perhaps a little salad) around 16:00, and dine at around 18:00ish, giving myself a little wiggleroom. I’m not religious about it and will slide it if necessary.
As you can see: that makes what is nominally my breakfast practically a pre-dinner snack, and I clearly ignore the “best to eat in the morning” rule because that’s not consistent with my desire to have a family dinner together in the evening while still practicing the level of fasting that I prefer.
Science is science, and that’s what we report here. How we apply it, however, is up to us all as individuals!
Enjoy!
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